<template>
  <div class="super-flow-base-demo">
    <super-flow
      ref="superFlow"
      :node-list="nodeList"
      :link-list="linkList"
      :origin="origin"
      :graph-menu="graphMenuList"
      :node-menu="nodeMenuList"
      :link-menu="linkMenuList"
      :enter-intercept="enterIntercept"
      :output-intercept="outputIntercept"
      :link-desc="linkDesc"
    >
      <template v-slot:node="{ meta }">
        <div :class="`flow-node flow-node-${meta.prop}`">
          <header class="ellipsis">
            {{ meta.name }}
          </header>
          <section>
            {{ meta.desc }}
          </section>
        </div>
      </template>
    </super-flow>

    <el-dialog
      :title="drawerConf.title"
      :visible.sync="drawerConf.visible"
      :close-on-click-modal="false"
      width="500px"
    >
      <el-form
        @keyup.native.enter="settingSubmit"
        @submit.native.prevent
        v-show="drawerConf.type === drawerType.node"
        ref="nodeSetting"
        :model="nodeSetting"
      >
        <el-form-item label="节点名称" prop="name">
          <el-input
            v-model="nodeSetting.name"
            placeholder="请输入节点名称"
            maxlength="30"
          >
          </el-input>
        </el-form-item>
        <el-form-item label="节点描述" prop="desc">
          <el-input
            v-model="nodeSetting.desc"
            placeholder="请输入节点描述"
            maxlength="30"
          >
          </el-input>
        </el-form-item>
      </el-form>
      <el-form
        @keyup.native.enter="settingSubmit"
        @submit.native.prevent
        v-show="drawerConf.type === drawerType.link"
        ref="linkSetting"
        :model="linkSetting"
      >
        <el-form-item label="连线描述" prop="desc">
          <el-input v-model="linkSetting.desc" placeholder="请输入连线描述">
          </el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="drawerConf.cancel"> 取 消 </el-button>
        <el-button type="primary" @click="settingSubmit"> 确 定 </el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script >
import SuperFlow from 'vue-super-flow'
import 'vue-super-flow/lib/index.css'
const drawerType = {
  node: 0,
  link: 1,
}
export default {
  components: { SuperFlow },
  data() {
    return {
      drawerType,
      drawerConf: {
        title: '',
        visible: false,
        type: null,
        info: null,
        open: (type, info) => {
          const conf = this.drawerConf
          conf.visible = true
          conf.type = type
          conf.info = info
          if (conf.type === drawerType.node) {
            conf.title = '节点'
            if (this.$refs.nodeSetting) this.$refs.nodeSetting.resetFields()
            this.$set(this.nodeSetting, 'name', info.meta.name)
            this.$set(this.nodeSetting, 'desc', info.meta.desc)
          } else {
            conf.title = '连线'
            if (this.$refs.linkSetting) this.$refs.linkSetting.resetFields()
            this.$set(this.linkSetting, 'desc', info.meta ? info.meta.desc : '')
          }
        },
        cancel: () => {
          this.drawerConf.visible = false
          if (this.drawerConf.type === drawerType.node) {
            this.$refs.nodeSetting.clearValidate()
          } else {
            this.$refs.linkSetting.clearValidate()
          }
        },
      },
      linkSetting: {
        desc: '',
      },
      nodeSetting: {
        name: '',
        desc: '',
      },

      origin: [2000, 2000],
      nodeList: [],
      linkList: [],

      graphMenuList: [
        [
          {
            label: '开始节点',
            disable(graph) {
              return !!graph.nodeList.find((node) => node.meta.prop === 'start')
            },
            selected: (graph, coordinate) => {
              const start = graph.nodeList.find(
                (node) => node.meta.prop === 'start',
              )
              if (!start) {
                graph.addNode({
                  width: 100,
                  height: 80,
                  coordinate: coordinate,
                  meta: {
                    prop: 'start',
                    name: '开始节点',
                    desc: '123',
                  },
                })
              }
            },
          },
          {
            label: '条件节点',
            disable: false,
            selected: (graph, coordinate) => {
              graph.addNode({
                width: 160,
                height: 80,
                coordinate: coordinate,
                meta: {
                  prop: 'condition',
                  name: '条件节点',
                },
              })
            },
          },
          {
            label: '审批节点',
            disable: false,
            selected: (graph, coordinate) => {
              graph.addNode({
                width: 160,
                height: 80,
                coordinate: coordinate,
                meta: {
                  prop: 'approval',
                  name: '审批节点',
                },
              })
            },
          },
          {
            label: '抄送节点',
            disable: false,
            selected: (graph, coordinate) => {
              graph.addNode({
                width: 160,
                height: 80,
                coordinate: coordinate,
                meta: {
                  prop: 'cc',
                  name: '抄送节点',
                },
              })
            },
          },
          {
            label: '结束节点',
            disable(graph) {
              return !!graph.nodeList.find((point) => point.meta.prop === 'end')
            },
            selected: (graph, coordinate) => {
              graph.addNode({
                width: 80,
                height: 50,
                coordinate: coordinate,
                meta: {
                  prop: 'end',
                  name: '结束节点',
                },
              })
            },
          },
        ],
        [
          {
            label: '全选',
            selected: (graph, coordinate) => {
              graph.selectAll()
            },
          },
        ],
      ],
      nodeMenuList: [
        [
          {
            label: '删除',
            disable: false,
            hidden(node) {
              return node.meta.prop === 'start'
            },
            selected(node, coordinate) {
              node.remove()
            },
          },
        ],
        [
          {
            label: '编辑',
            selected: (node, coordinate) => {
              this.drawerConf.open(drawerType.node, node)
            },
          },
        ],
      ],
      linkMenuList: [
        [
          {
            label: '删除',
            disable: false,
            selected: (link, coordinate) => {
              link.remove()
            },
          },
        ],
        [
          {
            label: '编辑',
            disable: false,
            selected: (link, coordinate) => {
              this.drawerConf.open(drawerType.link, link)
            },
          },
        ],
      ],
    }
  },
  created() {
    const nodeList = [
      {
        id: 'nodeS3WgFnzCI15X58Qw',
        width: 100,
        height: 80,
        coordinate: [-644, -148],
        meta: {
          prop: 'start',
          name: '开始节点',
        },
      },
      {
        id: 'nodeDhVU6w2KbEnJCjZs',
        width: 80,
        height: 50,
        coordinate: [286, -133],
        meta: {
          prop: 'end',
          name: '结束节点',
        },
      },
    ]
    const linkList = []

    setTimeout(() => {
      this.nodeList = nodeList
      this.linkList = linkList
    }, 100)
  },
  mounted() {
    this.$nextTick(() => {
      this.$el.scrollBy({
        left: (this.$el.scrollWidth - this.$el.clientWidth) / 2.2,
        top: (this.$el.scrollHeight - this.$el.clientHeight) / 2,
      })
    })
  },
  methods: {
    enterIntercept(formNode, toNode, graph) {
      const formType = formNode.meta.prop
      switch (toNode.meta.prop) {
        case 'start':
          return false
        case 'approval':
          return ['start', 'approval', 'condition', 'cc'].includes(formType)
        case 'condition':
          return ['start', 'approval', 'condition', 'cc'].includes(formType)
        case 'end':
          return ['approval', 'cc'].includes(formType)
        default:
          return true
      }
    },
    outputIntercept(node, graph) {
      return !(node.meta.prop === 'end')
    },
    linkDesc(link) {
      return link.meta ? link.meta.desc : ''
    },
    settingSubmit() {
      const conf = this.drawerConf
      if (this.drawerConf.type === drawerType.node) {
        if (!conf.info.meta) conf.info.meta = {}
        Object.keys(this.nodeSetting).forEach((key) => {
          this.$set(conf.info.meta, key, this.nodeSetting[key])
        })
        this.$refs.nodeSetting.resetFields()
      } else {
        if (!conf.info.meta) conf.info.meta = {}
        Object.keys(this.linkSetting).forEach((key) => {
          this.$set(conf.info.meta, key, this.linkSetting[key])
        })
        this.$refs.linkSetting.resetFields()
      }

      conf.visible = false
    },
  },
}
</script>

<style lang="scss">
.ellipsis {
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  word-wrap: break-word;
}

.super-flow-base-demo {
  width: 100%;
  height: 800px;
  margin: 0 auto;
  background-color: #f5f5f5;
  overflow: scroll;

  .super-flow {
    width: 4000px;
    height: 4000px;
  }

  .super-flow__node {
    .flow-node {
      > header {
        font-size: 14px;
        height: 32px;
        line-height: 32px;
        padding: 0 12px;
        color: #ffffff;
      }

      > section {
        text-align: center;
        line-height: 20px;
        overflow: hidden;
        padding: 6px 12px;
        word-break: break-all;
      }

      &.flow-node-start {
        > header {
          background-color: #55abfc;
        }
      }

      &.flow-node-condition {
        > header {
          background-color: #bc1d16;
        }
      }

      &.flow-node-approval {
        > header {
          background-color: rgba(188, 181, 58, 0.76);
        }
      }

      &.flow-node-cc {
        > header {
          background-color: #30b95c;
        }
      }

      &.flow-node-end {
        > header {
          height: 50px;
          line-height: 50px;
          background-color: rgb(0, 0, 0);
        }
      }
    }
  }
}
</style>